Apparatus for drilling, reaming, and countersinking



4 SHEETS-SHEET l.

Patented Sept. 14, 1920.

/u I I II fII/ IIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII" 0. F. BALTZLEY.

APPARATUS FOR DRVILLING., REAMING, AND COUNTERSINKING. I APPLICATION FILED APII.3. 1919. 1,352,646.

0. F. BALTZLEY. APPARATUS For: DRILLING, REAMlNGQAND couNTERslNKING.

APPLICATION FILED AFFI-3. 1919.

Patented sept. 14,1920.

4 SHEETS-SHEET 2.

` [Nl/ENTOR Afforney APPLICATION m'ED APR. 3. 1919.

Patented Sept. 14, 1920.

4 SHEETS-SHEET 3.

[NVE/WOR o. F. BALTZLEY. APPARATUS FOR. DRILLING, REAMING, AND COUNTERSINKING.

APPLICATION FILED APH. 3. 1919.

Patented Sept. 14, 1920.

4 SHE`TS-SHEET 4. Q

rah/Aw@ WJT/VESSES unirsi)V s'rArEsl PATENT orricr..

OBEN F. BALTZLEY, H VAGIERSTOWN', MARYLAND, ASSIGNOR T0' `THE LIBRTY TOOL COMPANY, 0F BALTIMORE, MARYLAND, A CORPORATION 0F MARYLAND.

.APPARATUS FOR DRILLING, REAMING, AAND COUNTERSINKING.

To all whom t may concern Be it known that I, @mais F. BALTZLEY, a' citizen of the United States, and resident of Hagerstown, Md., have invented certain new and useful Improvements in Apparatus for Drilling, -Reaming, and Countersinking, of which the following is a specification.

My invention is an improvementl upon portable a' paratus for drilling, reaming, or counters' ing and one object of the invention is to provide such an arrangement and construction of parts as will ive large capacity, to the machine by ena ling it to be used in situations where machines as heretofore constructed could not be employed.

A prior form of portable machine is that shown iii' the patent of Dii'endall No. 1249045, December 4, 1917, in which a cut-- ting tool and its driver are carried by la bracket or support mounted on a frame- 4 member or bar which has fixed thereon at its 'the work relative to the frame bar or member and the cutting device carried thereby,

f when said piston is operated by fluid presl sure let into the cylinder.

An objection exists to this cylinder and piston arranged at the endof the frame and beyond the point where the work is done. There are work pieces of such form or of-` such location relative to other parts of the structure with which they` are associated that the cylinder and its piston cannot be fitted to because of lack of space.

I therefore dispense with the cylinder and piston at the end f the main frame member or bar and insteall I provide a feed foot or what is callediii the trade a crow-footixed to the frame member or bar to engage and hold or feed the work piece. This frame member or bar and the tool are relatively movable, the frame member and the tool carrier having a sliding connectiony with each other. The relative movement is effected by a cylinder and iston operated by fluid pressure, the piston eing connected toone of said arts i. e. either the main frame member or t e tool carrier and the .cylinder bein connected to the other so that when the flui pressure is on there will be a relative movement between the main frame member and the tool carrier and therefore the feed foot on the frame member or bar will feed the work piece to the tool, if the latter is held Specication of Letters yatent.

Patented Sept. 14,1920.

application inea April a, 1919. serial No. 297,259.

at one-position, or incase the work piece is o f such a character that it must remain stationary then the feeding movements take place at the tool carrier. l

In either case there is a relative movement between the main frame carrying the feed foot and the toolcarrier, the fluid pressure operated means acting in part on the tool carrier and in pa'rton the main frame or bar, and not acting on the work piece directly so that both the cylinder and piston can be located apart from the the work piece is to be held or ed.

This crow-foot or feed foot extends' -the machine has a wider range of use than machines of the prior form.

The invention consists'in the features and combination and-arrangement of parts hereinafter described and particularly pointed out in the claims.

In the accompanying drawings;

Figure 1 is a side view of a' portable apparatus embodying the invention.

Fig. 2 is a sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a sectional view on the line 3--3 of Fig. 1.

`Fig. 4 is an end view of the apparatus looking fromthe right of Fi 1.

Fig. 5 is an end view loo ing from the left of Fig. 1, and, y p

Fi 6 1s a horizontal sectional view substantially on the line 6-6 of F1 1.

Fig.'7 is a View of a modiliged form of apparatus.

ig. 8 is a view of a further modification.

Fig.- 9 is-a view of a modification of the work holding foot.r .n

Fig. 10 is a. view of a detail.

` In these drawings 1 Iis the tool which is representative of any form desired for drilling, reaming, or countersinkin This tool is driven by a motor of any desired kind, the general outline of which is indicated by the dottedline at b in Fig. 1 and in full lines in threaded end to engage a suitable portion of the motor casin the said bolt havin a hand wheel d an the bolt being mounte in the arm e of a frame member or bracket extending at one side of the axis of the motor. rThis frame or bracket has an adjustable arm e which can be set at different points, for which purpose a dove-tail track ortion is employed at f, forming part o the tool bracket which receives a correspondingly formed lower portion of the arm e.

clamping bolt g is adapted to tix the arm e' in any position to which it may be adjusted. The arm e has an opening e to receive a portion of the motor casing, such as the boss h, so that when this arm is properly adjusted it will support the motor at th1s point. The;

tool supporting bracket is mounted upon a main frame, or carrying bar with which it has sliding engagement, so that one of, these parts, main frame har and tool carrier or bracket, may move relatively one to the other.

The tool .carrier or bracket is formed with or has attached thereto .cylinders lo, 7c, preferably two in number, which cylinders are located on opposite sides of the main frame bar z', the axes of the cylinders and of the bar being in the same plane, as shown in Fig. 3. These cylinders containpistons c, lc', the rods Z of which extend through the heads of the cylinders at one end as shown at Z.

The outer ends of the said piston rods are connected together by a transverse member or yoke m. The piston rods are reduced where they pass through this yoke and nuts m clamp the yoke to the piston rods. ,This yoke has an opening at-its central portion as at n, which receives the main frame member e" and means are provided whereby this yoke may be fixed to the frame bar z' at different points along the same. This means may be of various forms but'in the particular construction shown it consists of a bolt o having its side face at .0 corresponding in curved shape to the side of the frame bar, so that as the bolt is drawn upwardl this curved face will bear upon the cylin rical face of the frame member or bar and will hold the piston rod yoke firmly in any position in which the latter may be set,

For drawing the bolt into clamping position its upper end is screw threaded and a nut o operated by a handle o2 will effect the drawing up of the bolt into clamping position.` The frame or bar z' has mounted thereon a feed foot or what is known as a crow-foot. This consists of a member p having an opening to receive the feed or holding bar z'. The shank end of this crow-foot member is split and receives a cross bolt p' operatedl` by a handle p to draw the split portion p2 together, so as to clamp the crow-foot member on the bar i. The upper end of the crow-foot member may be forked so that the drill may pass between the arms of this fork in case the drilling operation carries the drill entirely through the work-piece.

Instead, however, of forming the crowfoot member in onepiece it may be formed in two pieces as shown, as in Figs. 7 and 9 the upper piece having the crow-foot or fork at p3 and the lower piece being slotted at f so that the crow-foot member p3 can e adjusted vertically, a bolt p being employed to clamp the crow-foot or fork p3 to the lower portion of this member. A work clamp g is also mounted on the holding or feed bar z' and is provided with a clamping member g by which the work clamp can be set at different points along the bar t' and a stop r is also mounted on the feed or holding bar i to be set in different positions as may be desired by a set bolt r. The work piece is indicated at lV and this is representative of any member which is to be drilled, countersunk, or reamed which the appliance is capable of receiving and this piece is representative of a work piece of any thickness on which the appliance will operate.

The work-piece is clamped between the crow-foot l member and the work clamp g and then by introducing the motive power into the cylinders back of the pistons relative movement will insure between the feed or holding bar z' with the work piece and the cylinders with the tool bracket carrying the motor and the tool so that the work piece and tool will be brought together for the operation to be performed on the work piece.

above the point where the work is to be i performed, or in other words on the same side of the work-piece that the motor and tool are located and the work-piece instead of being located between the piston and the tool is located between a crow-foot or feed foot p and the tool, this crow-foot being rendered effective by the relativemovement of the tool carrier and main frame bar i. This crow-foot or feeding foot isof small dimensions compared to that of the cylinder and piston heretofore employed at this situation, for instance as the Difendall patent, and it occupies little space in the direction of the axis of the to0l,' and there are many situations where this crow-foot can reach between4 a flange and an adjacent member whichlzwould form an obstruction to the use of a cylinder and piston, such as is employed in the Dil'endall patent.

It will be observed that by setting stop r permitted to passl throu h the work piece completely if desired.

he stop i' arrests the relative movement ofthe feed or hold` ing bar z', with the work piece and the main tool or bracket with the tool by coming against the end of the bracket.

It will be understood that I do not limit `myself to the use of two cylinders and pistons for operating the bar or frame member for clamping or feeding the work piece as a single cylinder may be employed and this may be used as a part of the tool carrying frame oli' to one side of the axis of the tool, or it may be differently located as will be referred to more fully hereinafter.

Means are provided for ejecting the tool from its socket in the motor, this consisting of a screw threaded bar lS operated by a `handle s' and having anextension s with a rod s2 to bear on the shank of the tool.

Suitable handles are indicated in dotted lines at t by which the apparatus may be held in position while operating.

The crow foot7 or feed foot for the work piece may be of the form shown in Fig. 10 z'. e. generally of U-shape with one side extended, and this may support the forked member like p3. Thls form of Work-piece holder or crow-foot will enable the apparatus to be placed so that the tool will operate at a greater distance from the edge of the work-piece than is the case with the form first described.

The piston and cylinder may be operated by air or by a liquid. The fluid pressure is introduced to the end of the cylinder or cylinders back of the piston-through a pipe u, the pressure being controlled by a valve located at fu operated by a handle o and a bleed nipple w is employed to allow-the pressure to bleed out from the cylinder back of the piston. Openings 1c are formed through the'cylinder heads to prevent the formation of an air cushion against which the piston would have to Work.

While only one cylinder and piston may be used I prefer to employ two in order to better distribute the thrust and get a better balanced movement.

As. illustrating thefact that my invention may be embodied in different forms I refer to Fig. 7 in which the cylinder and piston, instead of being located off to one side of motor, or as a part of the motor bracket or supporting frame is arranged beyond or above the end of `this frame and is sepa-- rately mounted on the carrying or feed bar. This cylinder k3 is clamped adjustably to the carrying rod. The piston 7:* is connected by its piston rod 71:5 with the bracket or frame 'e3 in which the motor is supported, this frame having a hinged arm e* for supporting one end of the motor casing. This arm is held in position to act asa support by a hinged bolt e. Other features of this modification may be like those described above, such 'as the crow-foot, stop, and handles and pipe connections.

The fluid may be introduced into the cylinder'by making the vpiston rod with a lconduit k6, the inlet for the fluid isindicated at k7.

It Will be observed that while the piston and cylinder will give a relative movement to the feed or carrying bar and the motor and tool in opposite directions and in this general respect is like the form first de'- scribed the piston in this modification is connected with the tool carrying frame and the cylinder is connected to the feed bar.

In Fig. 8 I show a single cylinder andv piston. The cylinder is formed with or attached to the tool carrying bracket and forms the base of said bracket. The cylinder is of substantially the same length as the bracket and occupies no more space longitudinally of the machine than the bracket except for a projecting stuffing box at 10. The frame bar i passes through the cylinder and piston and means must be provided for fixing the piston to the frame bar, so that the frame bar will act like 'the rod of said piston and relative movement be secured of the bar orrod and the tool bracket.

In the particular construction shown the piston has Within it a split collar 11 surrounding the cylindrical frame' bar i. A wedge member 12 is adapted to spread the split collar and thus bind itself together with the piston to the frame bar.

'For operating the wedge a cup-shaped nut 13-is screw-threaded into a hole in the piston and presses the wedge into place.

This nut is turned by key'14 having its end to fit into the cup or socket of the nut.

This key is permanently carried by the cylinder Wall but normally it is pressed by a spring 15 out of connection with the nut, so that the piston with its piston rod z'. e. the main frame bar will be free to be moved in the cylinder.

The key has a conical valve portion 16 to be pressed on the seat 17 in the wall of the cylinder to prevent the escape of air. An

vexternal handle is shown at 18.

In all cases I prefer to use a bar circular in cross section for the main frame bar.

I claim:

1. A portable apparatus of the character described comprising a motor and a tool driven thereby, a main frame member or bar extending substantially parallel with the axis of the tool and having a feed foot at one end extending substantially at right angles to the frame member, a tool support slidably mounted on the bar, and a cylinder and piston, one connected with the tool support and the other with the frame member with means for supplying pressure Huid for effecting a relative movement between the tool support and frame member and consequently between the feed foot and tool, substantially as described.

'2. In portable apparatus of the class described, the combination of a tool support and a frame member slidably connected to the support for movement of one relative to the other, said frame member having work holding or feeding foot thereon for pres senti-ng the work piece to the tool and a cylinder and piston with a fluid pressure connection for effecting relative movement vbctween the tool support and the frame member and consequently between the tool and work piece, substantially as described.

3. In apparatus of the class described, the combination of a tool, a support for the same, a frame'bar slidably connected with the tool support to have one part move relative to the other, a feed foot on the frame bar for presenting the work piece tothe tool, a cylinder and piston with a fluid pressure connection thereto for effecting a relative movement between the tool support and bar and consequently between the tool and work piece, and a stop adjustably mounted on the bar to contact with the support and arrest the movement of the slidable part for determining the depth of cut of the tool, substantially as described., l

4. In portable apparatus of the class described, the combination of a tool support and a. frame vmember slidably connected to the support for movement of one relative to the other, said frame member having a work holding or feeding foot thereon for presenting the work piece to the tool and a cylinder and piston with a fiuid pressure connection for effecting relative movement between the tool support and. the pressure member andl `the tool support to have one part move relative to the other, a feed foot on the frame bar for presenting the work piece to the tool, a cylinder and piston with a fluid pressure connection thereto for effecting a relative movement between ,the tool and work piece, and a clamp mounted adjustably on the bar opposite the feed foot, substantially as described.

6. In portable apparatus of the class described, a motor and a tool carried thereby, a bracket having an arm in. which one end of the motor casing is mounted, and an adjustable arm on said bracket, in which the other end of said casing is mounted, a bar with which the frame is slidably connected,

said bar havin a feed foot extending opposite the tool or presenting the work piece to the tool, and a cylinder and piston with a fiuid pressure connection for giving a relative movement between the frame and bar, substantially as described. v

7. In portable apparatus of the class described, the combination of a tool sup ort and a frame member slidably connecte to the support for moveemnt of one relative to the other, said frame member having a work holding or feeding foot thereon for presenting the work piece to the tool and a cylinder and piston with a fluid pressure connection for effecting relative movement between the tool support and the frame member and consequently between the tool and work piece, said cylinder being carried by the tool support and the piston by the said frame member, substantially as described.

8. In `portable apparatus of the class described, the combination of a tool support and a frame member slidably connected to the support for movement of one relative to the other, said frame member having a work holding or feeding foot thereon for presenting the work piece to the tool and a cylinder and piston with a fluid pressure connection for effecting relative movement between the tool support and the frame member and consequently between the tool and work piece, said cylinder being carried by said tool support and located in the same plane, transverse of the bar, in which the tool support is located, substantially as described. l

9. In combination in a portable drilling apparatus, a tool, and tool support,-a frame member having a sliding connection with the tool support, a feed foot on theframe member extendingopposite the tool to present the work piece thereto, a pair of cylinders and pistons, said cylinders being located on opposite sides of the frame member and a fluid pressure connection, the cylinders and pistons being arranged to effect a relative movement of the frame member and tool support, substantially as' described. K

10. In combination in a portable drilling apparatus, a tool, and tool support` a frame member having a sliding connection with the tool support, a feed foot on the frame member extending opposite the tool to present the work piece thereto, a pair of cylinders and pistons, said cylinders being located n opposite sides of the frame mems ber and a fluid pressure connection, the cylinders and pistons being arranged to effeet a relative movement of the frame member and tool support, said pistons being connected tothe said frame member and the cylinders to the tool support, substantially as described.

11. A portable apparatus of the character described comprising a motor and atool driven thereby, a main frame member or bar extending substantially parallel with the axis of the tool and having a feed foot at one end extending substantially at right angles to the frame member, a tool support, a cylinder connected with the tool support at the base thereof, said tool support and cylinder being carried by the frame bar slidably and a piston for the cylinder connected with the frame member, with means for supplying pressure fluid for effecting a relative movement between cylinder and piston and consequently between the feed foot and tool.

12. ln combination a tool, a frame member having a feed or holding foot to engage the work and present the same to the tool, a cylinder and piston, a tool support having the cylinder connected thereto at its base, said tool support being slidably mounted on the framew member which extends therethrough parallel with the cylinder axis, and a piston rod extending through the cylinder head with means for connecting the said piston rod adjustably with the frame memy ber, substantially as described.

13. ln combination a tool, a frame member having a feed or holding foot to engage the work and present the same to the tool, a cylinder and piston, a tool support having the cylinder connected thereto at its base, said tool support being slidably mount` ed on the frame member which extends therethrough parallel with the cylinder axis, and a piston rod extending through the cylinder head with means for connecting the said piston rod adjustably with the frame member, and a second cylinder and piston located on the other side of the frame member from the cylinder first mentioned, the piston of said second cylinder also being connected adjustably with the frame member, substantially as described.`

14:. In combination a tool, a frame member having a feed or holding foot to engagey the work and present the same to the tool, a cylinder and piston, a tool support having the cylinder connected thereto at its base,`

said tool support being slidably mounted on the frame member which extends therethrough parallel with the cylinder axis, and

a piston rod extending through the cylinder head with meansfor connecting the said piston rod with the frame member, and a second cylinder and piston located on the other side of the frame member from thev cylinder; first mentioned, the piston of said second cylinder also beingv connected with the frame member, said connecting means scribed the combination of a tool support and a frame member relatively movable in a direction parallel with the axis of the tool', said frame member having a workholding or feeding foot thereon for presenting the work piece to the tool and a cylinder and piston with a fluid pressure connection for effecting relative movement between the tool support and the frame member and consequently between the tool and work piece, said cylinder being carried by the tool support and the piston by the said frame member, substantially as described.

16. A portable apparatus of the character described comprising a main frame member, a feed foot on the frame-member, a tool holder, said tool holder and frame member being slidable, one relative to the other in a direction parallel to the axis of the tool, a piston and cylinder, one of which is connected with the frame member and the other with the tool support and both of which are arranged apart from the feed foot', and means for supplying fluid pressure to effect the relative sliding movement between the tool holder and main frame member.

17. A portable apparatus of the class described comprising a tool support and a frame member having relative movement in a direction parallel with the axis of the tool, a work holding foot on the frame member for presenting the work to the tool, a cylinder and piston, one of which is connected with the tool holder and the other with the frame member and means for introducing fluid pressure into-the cylinder, said cylinder being arranged in the same plane transverse of the frame member in which the tool support is located.

18. A portable apparatus of the class described comprising a tool support and a frame member having relative movement in a direction parallel with the axis of the tool, a work holding foot on the frame member for presenting the work to the tool, a cylinder and piston, one of which is connected with the tool holder and the other with the frame member and means for introducing fluid pressure into the cylinder, said cylinder being arranged in the same plane transverse of the frame member in which the tool support is located, said cylinder being on the tool support.

In testimony whereof, I affix my signature.

oREN F. BAL'rzLEY. A n 

